The Sound Proof Foam Panels come with adhesive backing, making them easy to install without the need for any additional tools. Simply prepare a clean and wall surface, confirm the desired location, and stick the Acoustic Panels in place. The hexagonal design of our Acoustic Panels is not only functional, but also stylish, making them a for any and acoustic treatment. angled design of the Sound Proof Foam Panels reduces sound and creates a beautiful appearance. Sound Proof Foam Panels are environmentally friendly, odorless, safe to touch, and safe to breathe. These professional Acoustic Panels are perfect for reducing echoes on walls in recording studios, control rooms, offices, home recording studios, home theaters, and home offices. They absorb sound and reduce noise impact from outside, while also adding a decorative touch to your space. with adhesive backing, the color of the adhesive is random, no designation is accepted Colour:Silver-Gray Material:Polyurethane Size:About unilateral length:15cm,Thickness: 0.9cm Package Contents: 18 x Acoustic Foam Panels Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.